| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [noun prp] have been [v-ing] | 32 |
|
| 2 | which [noun] had been [v-ing] | 21 |
|
| 3 | which [noun] has been [v-ing] | 16 |
|
| 4 | which [noun pl] have been [v-ing] | 6 |
|
| 5 | which [noun] have been [v-ing] | 5 |
|
